PostgreSQL, or "Postgres" for short, is a super smart and powerful database management system which main job is to store huge amounts of data securely, keep it organized, and let applications retrieve it quickly. It's not an application you'd use directly on your computer like a word processor, but it's the powerful engine running in the background of tons of websites, mobile apps, and other software you use every day.
A strong selling point of PostgreSQL is that it's an object relational database that's incredibly good at handling not just simple data like names and numbers, but also more complex information and the intricate relationships between different pieces of data. It's famous for being highly reliable and strictly following the rules of storing and managing data, which is why developers trust it for their most important projects.
On top of all that, PostgreSQL comes from an open source project, so it's developed and maintained by a huge global community of volunteers who are passionate about making the best database possible. It's been around for over 30 years, and over that time, it has become one of the most advanced and feature-rich databases available. You can use it on a variety of systems, including Windows, different Linux distributions, macOS, Solaris, and BSD.
Why should I download PostgreSQL?
The most important thing about PostgreSQL is that it's incredibly reliable and focuses on data integrity. It helps you ensure that the data you put into it is safe and never gets corrupted. It strictly follows a set of principles called ACID, which is a technical way of saying that your data transactions are handled in a very safe and predictable way. This is why businesses trust it for their financial systems and critical applications, where losing or corrupting data is not an option and could be very dangerous.
PostgreSQL is also extremely powerful and packed with advanced features right out of the box, for which you often have to pay in other systems. It supports handling complex queries, and you can also use it for situations where lots of users are trying to access and change data at the same time. It can work with a variety of data types, so you're not limited to just text and numbers.
A huge advantage is that PostgreSQL is highly extensible and customizable in almost any way you can imagine. For example, if you need to work with geospatial data to build a map application, you can add an extension called PostGIS, which turns Postgres into a full-fledged geo-information system. This ability to add new data types, functions, and add-ons allows you to adapt PostgreSQL to almost any kind of project.
Even though it's rich in features, PostgreSQL is still the perfect database for developers who are just starting. Because it is entirely free, it's a fantastic tool for learning about how databases work. You can install it on your own computer and experiment with building real applications without paying for expensive licenses. The community around PostgreSQL is very engaged and has built tons of free tutorials, articles, and forums where you can get help and learn from experienced developers.
Since PostgreSQL isn't owned or controlled by a single corporation, its dedicated global community of volunteers is committed to keeping it free and open forever. There are no weird licensing fees or vendor lock-in, and the development process is very transparent. You can install PostgreSQL on Windows, different Linux distributions, macOS, Solaris, and BSD.
Is PostgreSQL free?
Yes, PostgreSQL is completely free, and it's released under a liberal open-source license. This license allows you to download, use, modify, and even distribute PostgreSQL for any purpose. It's a great solution whether you need it for a personal project, an educational institution, or a massive commercial application without paying any fees or royalties.
What operating systems are compatible with PostgreSQL?
PostgreSQL is a cross-platform solution that's compatible with a wide range of operating systems. It can be installed and run on all major desktop and server platforms, including Linux, Microsoft Windows, and macOS. It also runs on other Unix-like systems, such as FreeBSD and Solaris.
What are the alternatives to PostgreSQL?
MariaDB is an open source relational database created by the original developers of MySQL. Its biggest advantage is that you can switch from MySQL to MariaDB without having to change your applications. It's known for its fast performance, especially for certain types of queries, and for having a very open and community-driven development process. Like PostgreSQL, it is completely free and open source. MariaDB is available on Linux, Windows, and macOS.
MongoDB is a document-oriented database where, instead of storing data in rigid tables with rows and columns like PostgreSQL, it stores data in flexible, JSON-like documents. This makes it incredibly easy and fast to work with for modern web apps. It's a great choice when your data doesn't fit neatly into a table structure or when you need to be able to scale your database across many servers very quickly. MongoDB has a free and open source Community Edition, as well as a paid Enterprise Edition, and you can use it on Linux, Windows, and macOS.
SQLite is an embedded database, which means the entire database engine is just a library that you include inside your application. This makes it incredibly lightweight, fast, and easy to set up, as there's no server you need to configure. It's the perfect choice for mobile apps, desktop applications, or any other software where you need a simple, reliable, and self-contained database. SQLite is completely free and available in the public domain. It is used in countless applications, and you can run it on virtually every operating system imaginable.
